I changed the number of shards to 9, and kept the number of replicas at 2. Now the heap usage is around 50GB. I realized that shards use resources, so maybe more shards help use all the available resources. How many shards and replicas should I use for my daily indices, given that my disks are in RAID0 and Elasticsearch will have to compensate for a failure? Is it a better idea to not use daily indices?